Compensating binnacle.



A. LIETZ. COMPENSATING BINNACLE, APPLICATION FILED mus. me. 1,241,132

Patented Sept. 25, 1917 2 SHEETS-SHEET I.

[hI/EWYHP i sometimes favorably,

' ous deviations among ADOLPH LIE'IZ, or SAN RAFAEL, CALIFORNIA,

COMPENSATING BINNACLE.

To all whom it may concern:

Be it known that I, ADOLPI-I Lmrz, a citizen of the United States,residing at San Rafaehin the county of Marin andState of California,have invented a new and useful Improvement in Compensating Binnacles, ofwhich the following is a specification.

My invention relates to compensating mechanism for binnacles and thelike wherein the position of permanent magnets is adjusted to correctdeviations of the compass caused by magnetism induced within the hull ofa ship.

The hull'of an iron or steel ship is a magnet and the distribution ofits magnetism depends upon the direction of the ships head whenbuilding, this result being produced by induction from the earthsmagnetism, developed and impressed by the hammering of the'plates andframes during the process of building.

The disturbance of the compass by the magnetism of the hull is generallymodified,

more often unfavorably, by the magnetized fitting of the ship, such asthe mats, deck houses, engines and boilers. For this reason the compassneedle in every ship is more or less subject to variwhich may be mentioned, first, horizontal forces acting in a longitudinal direction inthe ship andcaused partly by the permanent magnetism of hard iron orsteel which is generally corrected or compensated by permanent magnetshorizontally placed in a fore and aft direction and partly by verticalinduction in vertical soft iron either before or abaft the compass; and"second, forces acting in a transverse direction, and caused by hardiron, which deviation is compensated by means of permanent magnetsathwartships and horizontal.

There are several other deviations due to other causes but these willnot be enumerated as they have no part in the present invention which isto provide a means whereby the fore and aft magnets, provided for thefirst mentioned deviation, and the athwartships or beam magnets providedfor compensating the second mentioned deviation, may be easily andquickly adjusted to correctly compensate the deviations mentioned, undervarious conditions.

I accomplish these features by means of the device disclosed in thedrawings forming a part of the present specification wherein likecharacters are used to designate simi- Specification of Letters Patent.

Patented Sept. 25, 19217.

lar parts throughout the said specification and drawings and in whichFigure 1 is a front elevation of a binnacle with the housing doorremoved disclosing the arr; ngement and location of the permanentmagnets and the trays provided for their support.

Fig. 2 is an enlarged plan view of the trays and supporting mechanismtherefor w removed from the housing of the binnacle,

and

Fig. 3 is a plan View ings.

Referring to the drawings, the numeral 1 is used to designate the bodyorhousing of a binnacle having a vertically disposed hollow tube '2which if projected, would penetrate the center of the compass above, andis provided with a rack 8.

A tray 4;, 'having'a bearing sleeve 6 slotted to receive the rack 3, isslidably mounted upon the tube 2 and is provided with opposite aperturedwebs 7 adapted to retain the permanent fore and aftmagnets 8 on eachside of the vertical center of the binnacl'e. The sleeve 6 is providedwith lugs 9 within which is'rotatably mounted a suitable pinion llmeshing with the rack 3 and having an extended stem 12 provided with asquared end adpated to receive and be rotated by a suitable wing nut 11.

The split sleeve 6 is also provided with a second set of lugs 16 adaptedto be drawn of Fig. 2 of the drawtogether and thereby tightly engage thetube 2, so as to rigidly secure the tray 4, by means of a threaded stem17 having a squared end 18 arranged to receive and be rotated by thewing nut 1 1 which is detachably secured on the end of the stem 12. I

A second or beam tray 18 is also provided with apertured webs 19arranged to hold a series of permanent beam magnets 20 at right anglesor transversely to the first mentioned magnets 8 and equally on bothsides of a center line drawn through said magnets 8 and transverselythereto.

The beam tray 18 is slidably mounted upon a second tube 22 by means of asplit sleeve 21 provided with lugs 23 within which is rotatably mounteda pinion 24 meshing with a rack 25 upon the tube 22 said pinion beingsecured to a shaft or stem 27 squared on the end to receive a wing nut28 whereby said stem 27 and pinion 24 thereon may be rotated and therebycause the tray 18 to be raised or lowered.

The split sleeve 21 is also provided with a second set of lugs 29adapted to be drawn tightly together by means of a threaded stem 31 andthereby cause said split sleeve 21 to tightly engage the tube 22 andretain the tray 18 at the desired elevation.

The stem 31 is also squared as at 32 to receive and be rotated by thewing nut 28 which is detachably mounted upon the stem or shaft 27. p i hThe corrective or compensating positions for the permanent fore and aftmagnets 8 and the beam magnets 19 lie respectively somewhere in avertical plane coincident with the longitudinal center of the ship onwhich the mechanical center of the binnacle and compass therein, areplaced; and in a vertical plane at right angles to and abaft thebinnacle with the permanent magnets 19 placed so as the first mentionedplane will bisect them.

For convenience, the fore and aft magnets 8 are equally distributed onboth sides of the longitudinal center of the binnacle. 1 and compasstherein. 4

The longitudinal and transverse variations are determined separately bymeans of mathematical analysis and each corrected mechanically byraising or lowering the trays 4 and 18.

) Either tray may be raised or lowered independently of the other byfirst loosening the securing lugs which cause the split sleeve totightly engage the tube on which it is mounted and then rotating thepinion 11 or 24, as the case may be, until the tray and permanentmagnets therein are adjusted to the proper position for correcting thedeviation when the wing nut is removed from the stem or shaft of thepinion operated and applied to the stem of the securing lugs for thepurpose of locking the sleeve and tray securely in position. c 7.

From the foregoing itis obvious that I have provided improved means foradjusting. the position of corrective or compensating magnets and alsoimproved means hereby said adjustment may be easily and g uicklysecured.

Having, thus described my invention What I claim as new and desire tosecure by Letters Patentis- 1. The combination with a binnacle andcompass therein of posed tubes; a magnet tray slidably mounted uponeachtube: means operatively connected to each tube and the tray thereonadapted to elevate either tray independently of the other; and meanssecured to each tray and adapted to secure the position thereof.

2. The combination with a binnacle and compass therein of a centralvertically disposed tube having a rack thereon; a second verticallydisposed tube having a rack thereon; a magnet'tray slidably mountedparallel vertically disupon-each tube; a pinion rotatably mounted uponeach tray and meshing with the rack on the tube; means operativelyconnected to each pinion whereby the same may be operated to raise orlower the tray on which it is mounted; and means secured to each trayand adapted to secure the same against movement on its respective tube.

3. The combination with a binnacle and compass therein of a verticallydisposed central tube having a rack thereon; a second verticallydisposed tube adjacent to and parallel with the first mentioned tube andhaving a rack thereon; a magnet tray having a split sleeve slidablymounted upon each tube; a pinion rotatably mounted upon each tray andmeshing with the rack on each tube; means operatively connected to eachpinion whereby the same may be operated and thereby raise or lower thetray on which it'is mounted; and means secured to each split sleeve andadapted to open or close the same and thereby release the said sleeve,from or secure the same to the tube on which it is mounted.

I 'ADOLPH LIETZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. O. Y

